Evaluating the Effect of Oxygen Vacancies on the Oxygen Evolution Reaction (OER) Activity of LaNiO3

IF 3.7 2区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Langmuir Pub Date : 2025-03-27 DOI:10.1021/acs.langmuir.4c0483310.1021/acs.langmuir.4c04833

Chuanmu Tian, Danni Wang, Kelvin H. L. Zhang and Jan P. Hofmann*,

{"title":"Evaluating the Effect of Oxygen Vacancies on the Oxygen Evolution Reaction (OER) Activity of LaNiO3","authors":"Chuanmu Tian, Danni Wang, Kelvin H. L. Zhang and Jan P. Hofmann*, ","doi":"10.1021/acs.langmuir.4c0483310.1021/acs.langmuir.4c04833","DOIUrl":null,"url":null,"abstract":"In this work, we have investigated the effect of oxygen vacancies on the surface composition, electronic structure, and oxygen evolution reaction (OER) performance of LaNiO3. The results show that the OER performance of LaNiO3 can be improved both by decreasing the oxygen partial pressure during film growth and annealing the thin film in a H2 atmosphere. X-ray photoemission spectroscopy (XPS) shows a significant increase in the Ni:La ratio on the LaNiO3 surface after the introduction of oxygen defects, especially after H2 treatment, where the Ni:La ratio reaches 3.5:1. The presence of oxygen vacancies leads to the aggregation of Ni on the surface of LaNiO3, which plays a crucial role in enhancing the OER performance of LaNiO3. In addition, the OER activity of both LaNiO3 and oxygen vacancy rich LaNiO3 decreases upon cyclic voltammetry (CV) between 1.0 and 1.5 V versus the RHE with an increase in the cycle number. XPS results reveal that the CV treatments lead to a decrease in the Ni concentration at the LaNiO3 surface, which is an important factor for the decrease in the OER performance of LaNiO3 as well as oxygen vacancy rich LaNiO3.","PeriodicalId":50,"journal":{"name":"Langmuir","volume":"41 13","pages":"8565–8573 8565–8573"},"PeriodicalIF":3.7000,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Langmuir","FirstCategoryId":"92","ListUrlMain":"https://pubs.acs.org/doi/10.1021/acs.langmuir.4c04833","RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

Abstract

In this work, we have investigated the effect of oxygen vacancies on the surface composition, electronic structure, and oxygen evolution reaction (OER) performance of LaNiO₃. The results show that the OER performance of LaNiO₃ can be improved both by decreasing the oxygen partial pressure during film growth and annealing the thin film in a H₂ atmosphere. X-ray photoemission spectroscopy (XPS) shows a significant increase in the Ni:La ratio on the LaNiO₃ surface after the introduction of oxygen defects, especially after H₂ treatment, where the Ni:La ratio reaches 3.5:1. The presence of oxygen vacancies leads to the aggregation of Ni on the surface of LaNiO₃, which plays a crucial role in enhancing the OER performance of LaNiO₃. In addition, the OER activity of both LaNiO₃ and oxygen vacancy rich LaNiO₃ decreases upon cyclic voltammetry (CV) between 1.0 and 1.5 V versus the RHE with an increase in the cycle number. XPS results reveal that the CV treatments lead to a decrease in the Ni concentration at the LaNiO₃ surface, which is an important factor for the decrease in the OER performance of LaNiO₃ as well as oxygen vacancy rich LaNiO₃.

Abstract Image

查看原文本刊更多论文

在这项工作中，我们研究了氧空位对 LaNiO3 的表面成分、电子结构和氧进化反应（OER）性能的影响。结果表明，在薄膜生长过程中降低氧分压和在 H2 气氛中退火都可以改善 LaNiO3 的 OER 性能。X 射线光发射光谱 (XPS) 显示，在引入氧缺陷后，LaNiO3 表面的 Ni:La 比率显著增加，特别是在 H2 处理后，Ni:La 比率达到 3.5:1。氧空位的存在导致镍在 LaNiO3 表面聚集，这对提高 LaNiO3 的 OER 性能起着至关重要的作用。此外，随着循环次数的增加，LaNiO3 和富氧空位 LaNiO3 在 1.0 至 1.5 V 之间的循环伏安（CV）相对于 RHE 的 OER 活性都会降低。XPS 结果表明，CV 处理导致 LaNiO3 表面的镍浓度下降，这是导致 LaNiO3 和富氧空位 LaNiO3 OER 性能下降的一个重要因素。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Langmuir 化学-材料科学：综合

CiteScore

6.50

自引率

10.30%

发文量

1464

审稿时长

2.1 months

期刊介绍： Langmuir is an interdisciplinary journal publishing articles in the following subject categories: Colloids: surfactants and self-assembly, dispersions, emulsions, foams Interfaces: adsorption, reactions, films, forces Biological Interfaces: biocolloids, biomolecular and biomimetic materials Materials: nano- and mesostructured materials, polymers, gels, liquid crystals Electrochemistry: interfacial charge transfer, charge transport, electrocatalysis, electrokinetic phenomena, bioelectrochemistry Devices and Applications: sensors, fluidics, patterning, catalysis, photonic crystals However, when high-impact, original work is submitted that does not fit within the above categories, decisions to accept or decline such papers will be based on one criteria: What Would Irving Do? Langmuir ranks #2 in citations out of 136 journals in the category of Physical Chemistry with 113,157 total citations. The journal received an Impact Factor of 4.384*. This journal is also indexed in the categories of Materials Science (ranked #1) and Multidisciplinary Chemistry (ranked #5).